Overlay of a star-trail photograph, in which stars (white arcs) appear to rotate around the north celestial pole, and a numerical simulation of time-invariant polarization lines (dark lines) as ...

A new study takes a close look at the brain of the migratory monarch butterfly to better understand how these remarkable insects use an internal compass and skylight cues to navigate from eastern ...

A new study takes a close look at the brain of the migratory monarch butterfly to better understand how these remarkable insects use an internal compass and skylight cues to navigate from eastern ...